public void udp_receiver()
{
xbs_messages.addInfoMessage(" * udp receiver thread started", xbs_message_sender.UDP_LISTENER);
byte[] data = new byte[2048];
IPEndPoint remote_endpoint = new IPEndPoint(IPAddress.Any, 0);
EndPoint ep = (EndPoint)remote_endpoint;
int bytes_received = 0;
xbs_udp_message msg = null;
#if !DEBUG
try
{
#endif
while (!exiting)
{
try
{
bytes_received = udp_socket.ReceiveFrom(data, ref ep);
}
catch (SocketException)
{
bytes_received = 0;
}
if (!exiting && bytes_received > 0)
{
xbs_node_message_type command = xbs_node_message.getMessageTypeFromUDPPacket(data);
msg = new xbs_udp_message();
msg.msg_type = command;
if (bytes_received > 3)
{
msg.data_len = xbs_node_message.getDataLengthFromUDPPacket(data);
if (msg.data_len + sizeof(UInt16) + sizeof(xbs_node_message_type) == bytes_received)
{
msg.data = new byte[msg.data_len];
Buffer.BlockCopy(data, xbs_udp_message.HEADER_LENGTH, msg.data, 0, msg.data_len);
}
else
{
#if DEBUG
xbs_messages.addInfoMessage("received packet with wrong length! expected " + msg.data_len + " but got " + (bytes_received - sizeof(UInt16) - sizeof(xbs_node_message_type)) + " bytes.", xbs_message_sender.UDP_LISTENER, xbs_message_type.ERROR);
#endif
msg = null;
}
}
else
{
msg.data_len = 0;
}
if (msg != null)
{
remote_endpoint = (IPEndPoint)ep;
msg.src_ip = remote_endpoint.Address;
msg.src_port = remote_endpoint.Port;
lock (_locker)
{
if (command == xbs_node_message_type.DATA)
{
lock (in_msgs_high_prio)
in_msgs_high_prio.Enqueue(msg);
}
else
{
lock (in_msgs)
in_msgs.Enqueue(msg);
}
Monitor.PulseAll(_locker);
}
}
}
}
#if !DEBUG
}
catch (Exception ex)
{
ExceptionMessage.ShowExceptionDialog("udp_receiver service", ex);
}
#endif
#if DEBUG
xbs_messages.addDebugMessage(" * udp receiver thread stopped", xbs_message_sender.UDP_LISTENER);
#endif
}
